function marginal = marginal_family(engine, i, t)% MARGINAL_FAMILY Compute the marginal on the specified family (jtree_unrolled_dbn)% marginal = marginal_family(engine, i, t)if nargin < 3, t = 1; endbnet = bnet_from_engine(engine);ss = length(bnet.intra);marginal = marginal_family(engine.sub_engine, i + (t-1)*ss);